環境試料中の207Bi
1985 年 34 巻 10 号 p. 555-558
詳細
1985 年 34 巻 10 号 p. 555-558
Measurements of fallout 207Bi in environmental samples were reported for water filters used at the Scott Base in Antarctica and the surface soils containing high amount of fallout nuclides. The level of 207Bi in these samples was found to be nearly the same or a little higher than that of fallout 60Co and the 207Bi/137Cs activity ratios were in the range of 0.001-0.018. Contamination of bismuth by 207Bi was found in “high purity” bismuth on market and its level was measured to be 1.9 mBq/g-Bi.
